Mudvayne bows at No. 2.

Mariah Carey grabs the best opening sales week of her career as her eighth studio album, "The Emancipation of Mimi" (Island/IDJMG), arrives atop The Billboard 200 with 404,000 U.S. copies, according to Nielsen SoundScan. Her first chart-topper in almost a decade ends the six-week reign of 50 Cent's "The Massacre" (Shady/Aftermath/Interscope), which falls 1-3, with sales down 15% from last week to 140,000 units.

Carey last reached The Billboard 200 summit in 1997 with "butterfly" (Columbia), which started with 235,000 copies and has sold 3.7 million to date. Her last effort, "Charmbracelet," opened at No. 3 with 241,000 copies and has sold 1.1 million.

Mudvayne debuts at a career-best No. 2 with "Lost and Found" (Epic), selling 152,000. The band's previous set, "The End of All Things to Come," opened at No. 17 with 79,000 units in 2002 and has sold 680,000 so far.

At No. 4, Garbage earns the first top 10 of its career with the Geffen set "Bleed Like Me," which sells 74,800. The group's "beautifulgarbage" (Almo Sounds/Interscope) bowed at No. 13 in 2001 with 73,000 copies and has sold 385,000 to date.

Faith Evans' "The First Lady" (Capitol) drops to No. 5 after her No. 2 debut last week. Sales are down 60% to 63,000 units.

The 18th installment of the "NOW That's What I Call Music!" series (Sony BMG/Universal/EMI/Zomba/Epic) dips 4-6 on a 20% fall to 61,000, while Beck's "Guero" (Interscope) slides 3-7 on a 28% slope to 58,000.

Green Day's "American Idiot" (Reprise) falls 7-8 on a 3% dip to 57,000. Gwen Stefani's "Love, Angel, Music, Baby" (Interscope) moves 15-9 on an 18% boost to 56,600 copies, while the Killers' "Hot Fuss" (Island) is up 11-10, on sales 2% stronger at 55,000.

Keith Urban's "Be Here" jumps 59-27 on a 67% gain to 25,000. Sales are boosted by his performance of the track "Days Go By" -- named video of the year at the recent CMT Music Awards -- on NBC's "Today" show last week.

Shooting 151-29, Slipknot rockets 261% to 24,000 copies with "Vol. 3: (The Subliminal Verses)" (Roadrunner/IDJMG), thanks to a re-release of the album featuring eight new bonus tracks.

Overall U.S. album sales are up about 1% over last week at 9.8 million units, but are down 25.5% from the same week last year. Sales for the year to date are 10% behind last year, at 165 million units.